A.fixed red light
B.flashing light
C.white light
D.occulting light
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A.directions
B.dangers
C.exclusion areas
D.All of the above
A.danger
B.vessels are excluded from the area
C.the buoy is a mooring buoy
D.operating restrictions are in effect
A.an isolated danger mark
B.a hydrographic data collection buoy
C.a mooring buoy
D.marking a restricted area
A.submerged rock，not dangerous to navigation
B.sunken wreck，not dangerous to navigation
C.towed-under buoy
D.All of the above
A.underway
B.making way
C.dead in the water
D.a power driven vessel
最新試題
Buoys which mark isolated dangers are painted with alternating（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A nun buoy will（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
How is the intensity of a light expressed in the Light Lists?（）.
A special purpose buoy shall be（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.